Mercurial > hg > config

annotate python/example/INSTALL.py @ 831:d1c147c73f34

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bytes vs string
author Jeff Hammel <k0scist@gmail.com>
date Sun, 19 Feb 2017 18:02:32 -0800
parents 05fef8e5b8a9
children
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1 #!/usr/bin/env python
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2
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3 """
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4 install and setup stuff
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5 """
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6
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7 ### imports
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8 import argparse
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9 import inspect
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10 import os
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11 import subprocess
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12 import sys
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13
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14 ### globals
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15 string = (str, unicode)
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16 BASEDIR = os.environ.get('VIRTUAL_ENV', os.getcwd())
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17
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18 def comment(text, comment_character='#', join=False):
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19 """
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20 comment some text
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21
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22 text -- text to comment
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23 join -- whether to ``str.join`` the lines of text
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24 """
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25 text = text.strip()
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26 if text:
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27 retval = ['{} {}'.format(comment_character, line.rstrip())
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28 for line in text.splitlines()]
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29 else:
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30 retval = []
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31 if join:
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32 retval = '\n'.join(retval)
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33 return retval
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34
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35
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36 class Command(object):
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37 """an individual command"""
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38 def __init__(self, command):
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39 self.command = command
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40 def shell(self):
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41 return isinstance(self.command, string)
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42 def interpolate(self, **variables):
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43 if self.shell():
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44 return self.command.format(**variables)
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45 return [i.format(**variables) for i in self.command]
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46 def commandline(self, **variables):
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47 command = self.interpolate(**variables)
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48 if self.shell():
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49 return command
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50 else:
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51 return subprocess.list2cmdline(command)
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52 __str__ = commandline
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53 def __call__(self, variables=None, **kwargs):
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54 variables = variables or {}
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55 commandline = self.commandline(**variables)
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56 kwargs['shell'] = self.shell()
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57 print (commandline)
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58 code = subprocess.call(self.interpolate(**variables), **kwargs)
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59 if code:
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60 raise subprocess.CalledProcessError(code, commandline)
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61
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62
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63 ### setup and installation steps
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64
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65 class Step(object):
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66 commands = []
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67 env = {}
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68 comment_character = '#'
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69
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70 @classmethod
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71 def name(cls):
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72 return cls.__name__
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73 @classmethod
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74 def description(cls):
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75 return (getattr(cls, '__doc__', '') or '').strip()
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76 @classmethod
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77 def name_and_description(cls):
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78 description = cls.description()
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79 return '{}{}'.format(cls.name(), ': {}'.format(description if description else ''))
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80 def __init__(self, **variables):
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81 self.commands = self.commands[:]
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82 self.variables = variables
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83 for key in self.env:
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84 os.environ[key] = self.env[key].format(**variables)
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85 def command_objs(self):
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86 return [Command(command) for command in self.commands]
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87 def interpolate(self):
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88 return [command.interpolate(**self.variables)
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89 for command in self.command_objs()]
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90 def write(self, output=sys.stdout):
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91 for command in self.command_objs():
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92 output.write(str(command) + '\n')
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93 def __call__(self):
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94 for command in self.command_objs():
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95 command(variables=self.variables)
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96 def script(self):
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97 retval = comment(self.name(), self.comment_character)
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98 description = self.description()
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99 if description:
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100 retval.extend(comment(description, self.comment_character))
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101 for command in self.command_objs():
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102 retval.append(command.commandline(**self.variables))
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103 return '\n'.join(retval)
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104
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105 class UbuntuPackages(Step):
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106 commands = [['sudo', 'apt-get', '-y', 'update'],
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107 ['sudo', 'apt-get', '-y', 'upgrade'],
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108 ]
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109 packages = []
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110 def __init__(self, **kwargs):
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111 Step.__init__(self, **kwargs)
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112 self.commands.append(['sudo', 'apt-get', '-y', 'install'] + self.packages)
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113
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114 class InstallXinePrerequisites(UbuntuPackages):
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115 """install the prerequisites for the xine-based client"""
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116 packages = ['libcurl4-gnutls-dev',
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117 'g++',
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118 'libx11-dev',
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119 'libxext-dev',
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120 'libxine1',
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121 'libxine-dev',
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122 'gxine',
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123 ]
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124
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125 class InstallFFMPEG(UbuntuPackages):
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126 """install prerequisites for the FFMPEG-based client"""
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127 packages = ['subversion',
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128 'make',
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129 'gcc',
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130 'g++',
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131 'libcurl4-gnutls-dev']
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132 yasm = '1.2.0'
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133 ffmpeg = '1.2'
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134 def __init__(self, client=os.path.join(BASEDIR, 'linux_client')):
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135 UbuntuPackages.__init__(self, client=client, yasm=self.yasm, ffmpeg=self.ffmpeg)
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136
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137 self.commands.extend([['mkdir', '-p', '{client}'],
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138 ['wget', 'http://www.tortall.net/projects/yasm/releases/yasm-{yasm}.tar.gz', '-O', '{client}/yasm-{yasm}.tar.gz'],
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139 ['wget', 'http://ffmpeg.org/releases/ffmpeg-{ffmpeg}.tar.gz', '-O', '{client}/ffmpeg-{ffmpeg}.tar.gz'],
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140 ['tar', 'zfvx', '{client}/yasm-{yasm}.tar.gz', '-C', '{client}'],
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141 ['tar', 'zfvx', '{client}/ffmpeg-{ffmpeg}.tar.gz', '-C', '{client}'],
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142
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143 # YASM
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144 'cd {client}/yasm-{yasm} && ./configure',
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145 'cd {client}/yasm-{yasm} && make',
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146 'cd {client}/yasm-{yasm} && sudo make install',
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147
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148 # FFMPEG
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149 'cd {client}/ffmpeg-{ffmpeg} && ./configure --enable-shared',
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150 'cd {client}/ffmpeg-{ffmpeg} && make',
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151 'cd {client}/ffmpeg-{ffmpeg} && sudo make install',
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152 ])
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153
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154
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155 ### functionality for running multiple steps
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156
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157 class Steps(object):
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158 """run a series of steps"""
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159
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160 comment_character = '#'
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161
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162 # instance defaults
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163 defaults = {}
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164
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165 # variable descriptions
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166 descriptions = dict()
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167
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168 def __init__(self, *steps, **variables):
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169 self.steps = steps
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170 self.variables = variables
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171 self.step_dict = {step.name():step for step in steps}
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172
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173 def parser(self, description=None):
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174 """return argument parser"""
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175 parser = argparse.ArgumentParser(description=description)
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176 parser.add_argument('--list', dest='list_steps',
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177 action='store_true', default=False,
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178 help="list available steps and exit")
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179 parser.add_argument('--commands', dest='list_commands',
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180 action='store_true', default=False,
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181 help="list commands to be run and exit")
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182 return parser
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183
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184 def comment(self, text, join=False):
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185 """
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186 comment some text
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187
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188 text -- text to comment
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189 join -- whether to ``str.join`` the lines of text
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190 """
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191 return comment(text, self.comment_character, join)
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192
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193 def script(self, steps=None, description=None, variables=None):
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194 """returns a script"""
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195 variables = variables or {}
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196 retval = ['#!/bin/bash', '']
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197 if description:
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198 retval.extend(self.comment(description))
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199 retval.append('') # whitespace delimiter
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200 steps = self.instantiate(*steps, **variables)
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201 for step in steps:
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202 retval.append(step.script())
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203 retval.append('') # whitespace
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204
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205 return '\n'.join(retval)
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206
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207 @staticmethod
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208 def args(step):
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209 args, varargs, varkw, defaults = inspect.getargspec(step.__init__)
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210 return args[1:]
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211
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212 def all_args(self, steps=None):
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213 retval = []
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214 steps = steps or self.steps
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215 for step in steps:
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216 args = self.args(step)
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217 retval.extend([arg for arg in args if arg not in retval])
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218 return retval
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219
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220 def get_variables(self, options, steps=None):
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221 """get variables from a namespace"""
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222 return {i:getattr(options, i, None) or self.defaults.get(i)
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223 for i in self.all_args(steps)}
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224
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225 def instantiate(self, *steps, **variables):
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226 """instantiate a set of steps with variables"""
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227 return [step(**{arg:variables.get(arg)
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228 for arg in self.args(step)})
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229 for step in steps]
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230
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231 def parse(self, args=sys.argv[1:], description=None):
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232
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233 # create a parser
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234 parser = self.parser(description)
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235
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236 # add step names as arguments
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237 parser.add_argument('steps', nargs='*', metavar='step',
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238 help="steps to run; if omitted, all steps will be run")
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239
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240 # add step arguments
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241 for arg in self.all_args():
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242 variable_description = self.descriptions.get(arg)
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243 default = self.defaults.get(arg)
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244 if variable_description and default:
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245 variable_description += ' [DEFAULT: %(default)s]'
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246 parser.add_argument('--{}'.format(arg), dest=arg,
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247 default=default, help=variable_description)
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248
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249 # parse arguments
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250 options = parser.parse_args(args)
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251
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252 # get steps to run
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253 if options.steps:
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254 missing = [i for i in options.steps if i not in self.step_dict]
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255 if missing:
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256 parser.error("No such step: {}".format(', '.join(missing)))
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257 steps = [self.step_dict[i] for i in options.steps]
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258 else:
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259 steps = self.steps[:]
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260
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261 # get variables for execution
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262 variables = self.get_variables(options)
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263
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264 if options.list_steps:
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265 # list steps and exit
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266 for step in steps:
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267 print (step.name_and_description())
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268 variables = self.args(step)
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269 if variables:
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270 print ('Variables: {}'.format(', '.join(variables)))
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271 print ('') # whitespace
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272 sys.exit(0)
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273
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274 # instantiate steps
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275 step_objs = self.instantiate(*steps, **variables)
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276
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277 if options.list_commands:
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278 # print commands and exit
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279 print (self.script(steps, description, variables))
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280 sys.exit(0)
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281
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282 # run steps
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283 for step in step_objs:
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284 step()
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285
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286
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287 ### main
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288
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289 def main(args=sys.argv[1:]):
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290 """CLI"""
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291 Steps(*[InstallXinePrerequisites,
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292 InstallFFMPEG]).parse(args=args, description=__doc__)
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293
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294 if __name__ == '__main__':
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295 main()